[PPS07-P07] Observation of near-earth object (1566) Icarus and the split candidate 2007 MK6
Keywords:Asteroids, Photometry, Near-Earth Objects
Observations: We conducted the observations for Icarus in 2015 and MK6 in 2016, respectively. The observation summary is shown as followings: Icarus (June 2015): Nayoro Observatory 1.6 m Pirka telescope of the Hokkaido University (visible photometry), Ishigakijima Astronomical Observatory (IAO) 1.05 m Murikabushi telescope (g', RC, and IC band simultaneous photometry), Maidanak Observatory (MO) 0.6 m telescope (R band photometry), Nishi-Harima Astronomical Observatory (NHAO) Nayuta 2.0m telescope (J, H, and KS band simultaneous photometry), Lulin and Kinmen Observatory 0.4 m telescopes (visible photmetry), Lowell Observatory (LO) 1.1 m, 1.8 m, and 4.3 m telescopes (visible photometry and visible spectroscopy), MK6 (June - July 2016): IAO 1.05 m Murikabushi telescope (g', RC, and IC band simultaneous photometry), MO 1.5 m telescope (R band photometry), NHAO Nayuta 2.0 m telescope (J, H, and KS band simultaneous photometry), Lulin Observatory 1.0 m telescope (visible photometry), LO 1.8 m and 4.3 m telescopes (visible photometry and visible spectroscopy), University of Hawaii 2.24 m telescope (visible photometry), Okayama Astrophyscial Observatory 1.88 m telescope (g', r', and z' band simultaneous photometry).
Results: Previous studies indicated that the taxonomic type of Icarus is an S-type or a Q-type . We obtained that the color indices g' - RC and RC - IC are 0.828 ± 0.027 mag and 0.397 ± 0.025 mag, respectively. These are consistent with the color indices of an S-type asteroid. Moreover, the color indices implied the slight rotational color variation, though the further data analysis is needed. On the other hand, the color indices and the rotation period of MK6 have not been revealed in the previous study. In addition to the color indices of Icarus, we will present the result the color indices of MK6 and the rotation period of both Icarus and MK6.
References:  Ohtsuka K. et al. (2007) ApJ, 668, L71-L74. Chapman C. R., Morrison D., and Zellner B. (1975) Icarus, 25, 104-139. Hicks M. D., Fink U., and Grundy W. M. (1998) Icarus, 133, 69-78.